Margin stop



March 6, 1934. F Hl TREGO 1,949,436

MARGIN STOP Original Filed March 22, 1930 2 Sheets-Sheet 1 INVENTORFran/r H. frego.

27% ATTORNEY March 6, 1934. F, H. TREGO 1,949,436

' MARGIN STOP Original Filed March 22, 1930 2 Sheets-Sheet 2 INVENTORFrank H4 Trag@ ATTORNEY Patented Mar. 6, 1934 UNITED `STATES PATENTGFFICE MARGIN STOP Delaware Original application March 22, 1930, SerialNo. 437,974. 'Divided and this application June 18,

1932, Serial No. 617,943

claims. (ci. 1er-7o) This invention is a division of my application,Serial No. 437,974, led Mar..22, 1930. It relates to typewritingvmachines andmore particularly to margin stops therefor.

L5 Features of the invention relate to novel construction of the marginstops.

Other features .and advantages will hereinafter appear.

In the drawings, l

Fig. 1 is a sectional side View of a portion of the machine showing theinvention applied thereto;

Fig. 2 is a sectional rear View of the machine taken on the line 2--2 ofFig. 1;

Fig. 3 is a detail rear View, on a larger scale, of the right-handmargin-stopand showing the stop released. from the stop bar to permitsetting it along the bar;

Fig. 4 is a sectional side view taken on the line 4-4 of Fig. 5;

Fig. 5 is a front view o-i the right-hand margin- A stop on thestop-bar;

Fig. 6 is a view similar to Fig. 3 showing the stop connected to thestop-bar;

Fig. '7 is a sectional view of the margin-stop taken on the line 7-7 ofFig. 6;

Fig. 3 is a developed view of the kind of blank from which the bodies ofboth right-hand and left-hand margin-stops are formed;

Fig. 9 shows the blank bent to form the body of one of the margin-stops;

Fig. 10 is a similar view showing the blank bent to form the othermargin-stop;

Fig. 11 is a view of the pawl used in either margin-stop;

Fig. 12 is a View of the blank from which the pawl operating lever ofeithermargin-stop may be formed; i

Fig. 13 shows the lever blank bent for use in one of the margin-stops;and

Fig. 14 shows the lever blank bent for use in the other margin-stop.

Similar reference characters represent similar parts throughout theseveral views.-

The invention is herein illustrated as applied to a Varityper writingmachine which includes a main-frame 15 having secured thereto a rail 16upon which is supported a carriage 17, having a bar 17a, to travel backand forth through the medium of anti-friction balls or rollers 18located between the rail 16 and the bar 17a.

The carriage is urged in a letter space direction (rightwardly in` Fig;2) by a spring drum, not Y shown, connected to the carriage 17 by astrap 20; The letter space movements of the carriage are controlled byescapement including a pinion 22 engaging a rack 23 on said carriage.

The carriage is provided with the usual feed rollers 32 and 33 by whicha work sheet 34 is fed upwardly with reference to the printinginstrumentalities, not shown. The carriage further includes end pieces36, connected to each other by a guide bar 37, and a margin-stop bar33;y the latter being attached to said end pieces by screws 39.

Two margin-stops 40 and 41 are supported on the stop-bar 33 andco-operate with an abutment 42 supported on the machine frame 15 in amanner hereinafter described. The stop 40 at the right-hand side of therear View (Fig. 2) determines the margin at the left-hand end of thework sheet and consequently will hereinafter be referred to as theleft-hand margin-stop; the other stop 41 will be referred to as therighthand margin-stop.

The abutment 42 is supported on a bar 43 which is herein supported forlateral movement, for a purpose hereinafter described, on the mainframe15 by shouldered screws 43*3L threadedL into posts 45 on a base plate45a of the mainframe; the screws 43EL passing through slots43D in thebar 43; the bar 43 being normally held against the Shanks of the screws43a as shown in Fig. 3, by a spring 44.

When the carriage is returned to begin a new line it is moved letwardlyin Fig. 2 until a projection 46 of the stop 40 engages the abutment 42.

As the typing proceeds the carriage travels in the opposite direction(rightwardly in Fig. 2). When the carriage approaches the end of theline, a bell, not shown, is sounded to inform the typist that the end ofthe line is near. Subsequently the key-levers, not shown, are lockedagainst actuation.

After the bell has been sounded, several characters may vyet be typedand then, as the border of the right-hand margin end of the line isreached, the key-levers are automatically locked to temporarily preventfurther typing. This locking of the keys is effected by a projection 48of the right-hand margin-stop 41 engaging the abutment 42 to slide thebar 43 rightwardly in Fig. 2, thus carrying an obstructing element intothe path of a cross-bar of the universal bar frame (not shown) thuslocking the universal bar to prevent the operation of the key-levers,the locking of the universal bar being effected within a single letterspace movement of the carnage.

Line lock releasing mechanism is provided to permit, if desired, a fewcharacters to be typed in the right-hand margin of the work sheet afterthe carriage has been locked at the border of said margin. Thismechanism includes a margin key operated lever having thereon a roller74 engaging in a slot of a release lever 76, so that when said levermoves upwardly it swings the release lever 76 in a counter-clockwisedirection (Fig. 2) to withdraw the abutment 42 from the path of theprojection 48 of the margin-stop 41 against the action of a spring 78;connection between the release lever 76 and the abutment 42 comprising astud 79 extending from the abutment into a slot of said release lever.As soon as the abutment is released the locking bar 43 is returned tonormal, by the spring 44 connected to the release lever 76, thusreleasing the carriage and carrying the abutment under the projection 48of the margin-stop, and also carrying the obstructing pawl 60 out of thepath of the cross-bar 61 to unlock the key-lever so that the fewadditional characters may be typed in the right-hand margin.

By an inspection of the drawings it will be seen that the stop-bar 38and the stops 40 and 41 are located at the front of the carriage wherethe stop may be readily reached for adjustment.

The margin-stops 40 and 4l are adjustable lengthwise of the stop-bar 38and may be set thereon at any letter space position. They are similar inconstruction, the stop 41 comprising an inverted U-shaped body portion90, bent up from a blank 91 (Fig. 8), the arms 92 of which extend to alevel below the lower face of the stop-bar 38. A pawl 93, having formedon one face thereof the projections or teeth 98 engaging between teeth99 of the stop-bar, is pivotally supported between the arms 92 on a'stud 94 which is secured to the lower ends of the arms 92. Theprojections 46 and 48 are formed on the opposite faces of the pawls andextend into the path of the abutment 42. A pawl operating lever 95 (Fig.13) is formed from a blank 96 (Fig. 12). Said lever is pivoted on thestud 94 about which it may be swung by a nger-piece 97 in acounterclockwise direction (Fig. 6), to carry the teeth 98 of said pawlout of engagement with the cooperating teeth 99 on the margin-stop bar38, through the medium of a stud 100 secured to the pawl 93 andextending through a hole 101 in the lever 95. After the pawl 93 has beenthus disengaged or released the stop may be adjusted to the desiredposition on the carriage by the assistance of a co-operating nger-piece102 secured to the body part of the stop. A return spring 103, connectedto the lever 95 and an ear 1030 on the stop body 90, holds the toothedend of the pawl 93 in active engagement with the stop-bar 38.

It will be understood that in the margin stop of this invention theimpact of the carriage is not transmitted to the body of the stop but istransmitted directly to the stop bar through the pawl 93. Consequentlydistortion of the body and shearing tendency on the pivot stud 94 isprevented.

To hold the lever 95 on the pivot stud 94 there may be provided a washer104 (Fig. 7) which is secured to the outer end of said stud. Theconnecting stud 100 may be provided with a head 105 to preventaccidental disconnection of the lever 95 from said stud. A spacer 106,which may be in the form of a flange 106 on the stud 94, prevents unduerubbing of the lever 95 against the arm 92 of the stop body.

To assist in locating the margin-stop the stop bar 38 has thereon ascale 107 which may be read through a slot 108 in the front arm 90 ofthe stop body; said arm having a pointer 109 formed thereon whichextends into the slot 105 and over the scale 107.

The margin-stop 40 is constructed of parts which are identical withthose of the stop 41 except that some of them, for example, the bodyblanks 91 and the lever blanks 96, are bent oppositely to those of stop41, see Figs. 12, 13 and 14. The pawls 92, pivot studs 94, connectingstuds 100 and springs 103 are identical in both stops. Except for theparts previously numbered the identical parts in both stops bear thesame reference characters. Parts in the stop 40 similar to those in thestop 41 bear the same reference characters with thesuperscript a.

Thus it will be understood that the stops 40 and 41 are similar and thatthey are symmetrically arranged on the stop-bar 38 to engage on oppositesides of the abutment 42.

While certain preferred embodiments of the invention have been shown anddescribed, it will be understood that changes in the form, arrangements,proportions, sizes and details thereof may be made without departingfrom the scope of the invention as defined in the appended claims.

I claim:-

1. In a typewriting machine, the combination of a carriage, a stop-barhaving teeth thereon, a margin-stop including a U-shaped body part toembrace the stop-bar, a fixed stud on said bodypart an element pivotallysupported on said stud and located between the walls of said bodypartbody portion, a tooth on said element to engage between the teeth of thestop-bar, a ngerpiece located on the exterior of said body portion andpivoted on said stud, a member on said element and engaged by saidlinger-piece; to release said element from the teeth of said bar, and aspring connected to said finger-piece to hold said element in engagementwith said stop-bar, a counter stop, and a member on said pivoted elementto be engaged by the counter stop to arrest the carriage.

2. In a typewriting machine, a stop-bar having teeth thereon, amargin-stop including an inverted U-shaped body portion to embrace thestop-bar, the sides of the body portion extending beyond the toothedface of the stop-bar, a toothed pawl pivoted between'the extended sidesof the body part, a spring to hold said pawl in engagement with saidbar, a nger-piece to release said pawl, and a co-operating finger-piecesecured to the base portion of said body part towards which cooperatingfinger-piece the rst named ngerpiece may be moved to release the pawland whereby the stop may be adjusted lengthwise of the stop-bar.

3. In a typewriting machine, a stop-bar having teeth thereon, amargin-stop comprising a U-shaped body portion to embrace the stop-bar,the sides of the body part extending beyond the toothed face of thestop-bar, a stud securing the free ends of the body in spaced relation,a toothed pawl located between said extended sides and pivotallysupported on said stud, said stud having a portion extending through andbeyond one of the extended sides, a finger-piece pivotally ist inengagement with said stop-bar.

4. In a typewriting machine, a stop-bar having teeth thereon, amargin-stop comprising a U- snaped body portion to embrace the stop-bar,the sides of the body part extending beyond the toothed face of thestop-bar, a toothed pawl located between said extended sides, a studsecured to the free ends of said sides, said pawl being pivotallysupported on said stud, a fingerpiece pivotally supported on said stud,an actuating stud connecting the finger-piece with said paWl, a washersecured to the end of the rst mentioned stud to hold the nger-piecethereon, and a flange formed on the first mentioned stud to space thenger-piece from the side of the body part.

5. In a typewriting machine, the combination of a carriage, a barthereon, a left-hand marginstop and a right-hand margin-stop on saidbar, and line lock mechanism including an abutment to be engaged by saidstops, said stops being symmetrically arranged at opposite sides of theabutment, each stop including a body part, a pawl, and an actuating`lever for said pawl, the body parts of both stops being formed ofidentical blanks bent in opposite directions, the actuating levers beingalso formed of identical blanks bent in opposite directions, and thepawls being identical so that they may be used in either stop.

FRANK H. TREGO.

